5.13

5.13 Starter

02 November 2011

18:17

·         

How can you fit a giraffe, 2 dogs and a swan into a standard laboratory beaker?!

5.13 Starter 2

02 November 2011

18:17

·         Use particle theory to explain why the gas in the balloon contracts

  

Explanation

·         The temperature of the gas inside the balloon decreases so the average speed of the particles decreases

·         Consequently the gas particles collide with the walls of the balloon with less force and less collisions per second

·         Because the walls of the container are flexible, the  volume decreases

5.13 Charles' law

28 October 2011

11:10

·         5.13 understand that there is an absolute zero of temperature which is –273^oC

	<<Charles' law interactive experiment.swf>>
			Open the Charles' law interactive experiment ·         Adjust the temperature ·         What’s the relationship between temperature and volume? ·         Plot a graph of V against T ·         Take a screen shot of the graph

5.13 results and conclusion

28 October 2011

11:10

Conclusion

·         Volume is directly proportional to absolute (Kelvin) temperature

·         (gas is at constant pressure - flexible container)

·         V Î± T

5.13 Plenary

02 November 2011

19:13

http://phet.colorado.edu/en/simulation/gas-properties

Instructions

·         Keep the Pressure constant (flexible container)

·         Pump some gas particles in

·         Predict what will happen when you heat the gas.  Try it. 

·         Predict what will happen when you cool the gas.  Try it.

 

Question

·         What would happen to the volume of the container if you could cool the gas to absolute zero, 0K? The volume will decrease as the gas cools down.

Charles' law interactive experiment.swf Download this file